<template>
  <div class="register">
    <div class="title">欢迎注册</div>
    <van-form @submit="onRegister">
      <van-field v-model="username" label="用户名" size="large" placeholder="请输入用户名"
        :rules="[{ required: true, message: '用户名不能为空' }]" />
      <van-field v-model="password" type="password" label="密码" 
      size="large" name="validator" placeholder="请输入密码"
        :rules="[{ required: true, message: '密码不能为空' }, 
        { validator: validatorPassword, message: '密码长度为6位' }]" />
      <!-- 通过 validator 返回错误提示 -->
      <van-field v-model="password2" type="password" size="large" label="重复密码" placeholder="请再次输入密码"
        :rules="[{ required: true, message: '重复密码不能为空' },
         { validator: validatorPassword2, message: '前后两次密码不一致' }]" />

      <div style="margin-top: 16px">
        <van-button round block type="primary" native-type="submit">注册</van-button>
      </div>
      <div class="footer">
        <span class="login" @click="goLogin">直接登录</span>
      </div>
    </van-form>
  </div>
</template>
  
<script>
import { getCurrentInstance, ref } from 'vue'
import router from '../router/index'
export default {

  setup() {
    const { proxy } = getCurrentInstance()
    const username = ref('');
    const password = ref('');
    const password2 = ref('');

    const validatorPassword = (val) => /\d{6}/.test(val);

    // 校验函数可以直接返回一段错误提示
    const validatorPassword2 = (val) => {
      console.log(val);
      if (val !== password.value) {
        return false;
      } else {
        return true;
      }
    };

    const onRegister = () => {
      if (username.value === '' || password.value === '' || password2.value === '' || password.value != password2.value ) {
        proxy.$toast.fail('请按照规范输入');
        return;
      }
      const data = {
        username: username.value,
        password: password.value,
        password2: password2.value
      }
      proxy.$axios.post('/register', data).then(res => {
        console.log(res);
        proxy.$toast.success('注册成功');
        router.push('/login')
      })
    }

    const goLogin = () => {
      router.push('/login')
    }


    return {
      username,
      password,
      password2,
      onRegister,
      goLogin,
      validatorPassword,
      validatorPassword2
    }
  },
}
</script>
  
<style>
.register {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: #eee;
  height: 100%;
}

.title {
  font-size: 1.75rem;
}

.van-form {
  height: 18.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.van-cell--large {
  margin: 0.625rem 0;
  border-radius: 8px;
}

.footer {
  color: #ccc;
  text-align: center;
  font-size: 0.875rem;
  padding: 0.625rem;
}

.login {
  color: #111010;
  font-weight: bold;
}
</style>